# Lab report remarks, and what they change

> Doctano turns the lab reports you already have into one private, source-linked health timeline, with an AI that answers from your own results.

The small print under a result is often the laboratory telling you how much to trust the number.

This is the Markdown version of https://doctano.com/guides/lab-report-remarks. The HTML page is the canonical version.

A remark on a lab report describes the sample or the measurement, not your health. Hemolysis, lipemia, clotting, dilution, a repeat test, and a fasting note can each change how much weight a value deserves. Read the lab's own wording, and ask for a repeat when the remark says the sample was unsuitable.

Remarks sit under a result, at the end of a panel, or in a footer. They are easy to skip, and they often explain a value that looks wrong.

## The two dates on every report

A report usually carries a collection date and a report date. The collection date, sometimes with a time, is when the blood was drawn. The report date is when the laboratory released the result. For a timeline, the collection date is the one to record.

The collection time matters for tests that change through the day, such as cortisol or iron, and for glucose after a meal. A report released in the evening from a morning sample still describes the morning.

## Remarks about the sample

These remarks describe the specimen. They matter because a problem with the sample can change a value before the analyser ever measures it.

| Remark | What it usually means | What to do |
| --- | --- | --- |
| Sample hemolysed | Red cells broke during collection or handling and released their contents into the serum. This can falsely raise potassium, LDH, and AST, and interfere with some assays. | Ask whether the affected tests should be repeated on a fresh sample. |
| Sample lipemic | Fat in the sample made it milky. Lipemia can interfere with some optical measurements. | A fasting repeat may be requested. Ask the lab which tests were affected. |
| Sample icteric | Bilirubin in the sample is high enough to interfere with some assays. | Ask the lab which results are affected and whether a repeat is needed. |
| Sample clotted | The blood clotted before analysis, so the result may not be valid. | Repeat on a fresh sample. |
| Insufficient sample | There was not enough blood to run the test. | Repeat the collection. |
| Sample diluted | A value above the analyser range was measured after dilution, and the reported result is corrected for it. | Usually nothing. Ask the lab to confirm if the value is far outside the range. |
| Test repeated | The laboratory ran the test again, or asked for a new sample. The wording may say which. | Check whether the result changed or a new sample is needed. |
| Result corrected | An earlier report was wrong and this report replaces it. | Use the corrected report and discard the earlier value. |
| Fasting not confirmed | The laboratory could not confirm that you had fasted. | Read glucose and triglyceride results with that in mind, and tell your doctor. |
| Collected and reported dates | When the blood was drawn, and when the report was released. | Use the collection date in a timeline. |

## Remarks about conditions

A note that fasting was not confirmed, or that a sample was collected after a meal, does not make a result invalid. It tells you the conditions were different, which matters when you compare the value with an earlier fasting result.

A note that a test was repeated can mean the laboratory re-ran the same sample, or that a new sample was requested. The remark wording matters. If it is unclear, ask which happened.

## Which remarks change a trend

A value from a hemolysed, clotted, or diluted sample is not a fair point on a chart. Neither is a glucose taken after breakfast if the previous one was fasting. Keep the remark with the value, and compare only results collected under similar conditions.

A corrected report supersedes the earlier one. If both are in your file, use the corrected value and note why it changed.

## What to ask the lab or doctor

- Which tests were affected by the remark?
- Should the result be repeated on a fresh sample?
- Was the sample fasting, and does that matter for this test?
- What does the remark mean for this value in particular?
- Can I get the corrected report if one was issued?

## How Doctano handles a remark

Doctano keeps each value linked to its original report, so the remark can be read in place, and DoctanoAI can use the report text when you ask about a result. It does not diagnose or decide whether a sample was acceptable. Verify important values against the original report.

## Remarks, answered

**What does hemolyzed mean on a blood test?**

Red blood cells broke during collection or handling and released their contents into the serum. That can falsely raise some values, such as potassium, LDH, and AST, and interfere with some assays. The lab may repeat the test.

**Does a hemolyzed sample always mean the result is wrong?**

No. It means the value should be read with caution, and the lab decides which tests were affected. Ask whether the affected result should be repeated on a fresh sample.

**What does sample diluted mean on a report?**

The value was above the analyser measuring range, so the lab diluted the sample and measured again. The reported result is corrected for the dilution, and the remark may state the factor.

**Why are there two dates on my report?**

One is when the blood was collected, the other when the report was released. Use the collection date when comparing results over time.

**What should I do if fasting was not confirmed?**

Read glucose and triglyceride results with that in mind, and tell your doctor. If a fasting comparison matters, ask whether a fasting repeat is needed.

## Limits

**A remark is not a diagnosis.** It describes the sample or the measurement. Ask the lab or your doctor whether the result should be repeated, and check important values against the original report.

## Links

- [Homepage](https://doctano.com/)
- [Lab report tracker](https://doctano.com/lab-report-tracker)
- [How to read a lab report](https://doctano.com/guides/how-to-read-a-lab-report)
- [Wrong blood test result](https://doctano.com/guides/incorrect-lab-results)
- [Reference ranges](https://doctano.com/guides/reference-ranges)
- [Track results over time](https://doctano.com/guides/track-lab-results-over-time)
- [All guides](https://doctano.com/guides/)